G'day, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
Waitomo Glowworm Caves
Valid Reviews
290 Valid Reviews
The Waitomo Glowworm Caves experience has a total of 291 reviews. There are 290 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 290 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
12% |
| 9/10 | 52 |
|
18% |
| 8/10 | 81 |
|
28% |
| 7/10 | 66 |
|
23% |
| 6/10 | 22 |
|
8% |
| 5/10 | 13 |
|
4% |
| 4/10 | 8 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
1% |
| 1/10 | 3 |
|
1% |
75.62% Average
The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.62% and is based on 290 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
263 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 290 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 263 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
11% |
| 9/10 | 49 |
|
19% |
| 8/10 | 76 |
|
29% |
| 7/10 | 57 |
|
22% |
| 6/10 | 21 |
|
8% |
| 5/10 | 13 |
|
5% |
| 4/10 | 7 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
2% |
| 1/10 | 2 |
|
1% |
75.36% Average
The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.83%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Somysolanki | 7/10 | 563 days | 100% |
| Anne | 7/10 | 898 days | 66% |
| ros fraser | 4/10 | 2908 days | 2% |
| wynden | 1/10 | 2936 days | 1% |
| Rado Hank | 10/10 | 3023 days | 3% |
| Lizzie Edmonds | 8/10 | 3024 days | 3% |
| Anis Quentin | 7/10 | 3031 days | 3% |
| Jeny Smolders | 7/10 | 3035 days | 3% |
| Oscar Petersen | 8/10 | 3042 days | 3% |
| Ani | 9/10 | 3150 days | 3% |
| Martin Murlik | 8/10 | 3263 days | 3% |
| Laura | 9/10 | 3274 days | 3% |
| Melanie Farrell | 7/10 | 3282 days | 3% |
| Andy | 10/10 | 3289 days | 3% |
| Julia Achatz | 5/10 | 3303 days | 2% |
| Auba Mateos | 7/10 | 3309 days | 3% |
| Charlotte | 7/10 | 3309 days | 3% |
| Isabel Zedelius | 8/10 | 3312 days | 3% |
| Dries | 8/10 | 3352 days | 3% |
| Clarissa Glaser | 8/10 | 3353 days | 3% |
| Alna | 10/10 | 3358 days | 3% |
| Holger Worner | 9/10 | 3358 days | 3% |
| Karlee Hormell | 9/10 | 3367 days | 3% |
| Alonso | 9/10 | 3371 days | 3% |
| Rose Guillaume | 8/10 | 3374 days | 3% |
| Caroline Coudray | 8/10 | 3378 days | 3% |
| Barbara | 8/10 | 3378 days | 3% |
| Leonie Brabers | 7/10 | 3386 days | 2% |
| Bina Johansson | 10/10 | 3386 days | 3% |
| Sam Staines | 9/10 | 3390 days | 3% |
| Erik | 6/10 | 3393 days | 2% |
| Nicole Signer | 8/10 | 3400 days | 2% |
| Sam Taylor | 7/10 | 3404 days | 2% |
| Vanuxem | 8/10 | 3608 days | 2% |
| Clara Bertomeu | 10/10 | 3608 days | 2% |
| Lukas Boller | 9/10 | 3610 days | 2% |
| Mette Elholm | 7/10 | 3624 days | 2% |
| Mathilde Arp | 8/10 | 3624 days | 2% |
| Chloe and Guillame | 9/10 | 3628 days | 2% |
| Andre | 9/10 | 3630 days | 2% |
| Doerte | 10/10 | 3630 days | 2% |
| Saskia Peek | 9/10 | 3631 days | 2% |
| Erika Tarant | 8/10 | 3631 days | 2% |
| Jennifer Nguyen | 7/10 | 3632 days | 2% |
| Julie Duvert | 7/10 | 3632 days | 2% |
| Dan Ramsl | 4/10 | 3632 days | 1% |
| Lucy Mulvin | 7/10 | 3633 days | 2% |
| Fine Kochling | 9/10 | 3635 days | 2% |
| Eberhard | 9/10 | 3635 days | 2% |
| Hannes | 8/10 | 3636 days | 2% |
| Calum Penn | 9/10 | 3638 days | 2% |
| Arthur Portolleau | 6/10 | 3639 days | 2% |
| Elisabet | 10/10 | 3640 days | 2% |
| Tommy Mannien | 8/10 | 3641 days | 2% |
| Solange Bourbeois | 8/10 | 3644 days | 2% |
| Talissa Missiato | 10/10 | 3644 days | 2% |
| Severin Knegsch | 9/10 | 3645 days | 2% |
| Pierre Jouffineau | 10/10 | 3646 days | 2% |
| Lewis Whittle | 8/10 | 3648 days | 2% |
| Ben and Pauline | 8/10 | 3650 days | 2% |
| Ann-Kathrin | 7/10 | 3655 days | 2% |
| Natasha Harbinson | 10/10 | 3656 days | 2% |
| Sebastian | 2/10 | 3657 days | 1% |
| Jaquein Bucholz | 3/10 | 3657 days | 1% |
| Chiara | 7/10 | 3657 days | 2% |
| Cariotta Kemper | 3/10 | 3657 days | 1% |
| Megan Lenox | 7/10 | 3660 days | 2% |
| Max Mustermann | 8/10 | 3662 days | 2% |
| Amy Stafford | 8/10 | 3665 days | 2% |
| Carl | 7/10 | 3665 days | 2% |
| Briony | 7/10 | 3667 days | 2% |
| Melanie Kronbichler | 8/10 | 3668 days | 2% |
| Andreas Schiefer | 7/10 | 3669 days | 2% |
| Veronique Kaplan | 3/10 | 3671 days | 1% |
| Robin Ings | 6/10 | 3672 days | 2% |
| Stula Vladimir | 7/10 | 3673 days | 2% |
| David Soukal | 8/10 | 3673 days | 2% |
| Olivia Aliprandi | 7/10 | 3674 days | 2% |
| Isabelle | 2/10 | 3676 days | 1% |
| Jonathan Gourmel | 8/10 | 3676 days | 2% |
| Mikkel Palleson | 4/10 | 3679 days | 1% |
| Franziska and Sabine | 7/10 | 3680 days | 2% |
| Chloe Guerillot | 7/10 | 3680 days | 2% |
| Faye Oliver | 7/10 | 3682 days | 2% |
| Iris Kerbler | 9/10 | 3682 days | 2% |
| Til Schaebitz | 6/10 | 3683 days | 2% |
| Elisabeth Grabner | 9/10 | 3685 days | 2% |
| Berith | 10/10 | 3685 days | 2% |
| Chris Simpson | 6/10 | 3688 days | 2% |
| Pekka and Jonna | 9/10 | 3688 days | 2% |
| Jonas Hoerning | 8/10 | 3689 days | 2% |
| Nils | 10/10 | 3689 days | 2% |
| Mark Rosema | 8/10 | 3690 days | 2% |
| Lisa Huber | 10/10 | 3690 days | 2% |
| Nicola Wiggan | 9/10 | 3711 days | 2% |
| Linda and Gunther | 4/10 | 3712 days | 1% |
| Julie | 9/10 | 3713 days | 2% |
| Maria Schaer | 7/10 | 3717 days | 2% |
| Mette and Jesper | 5/10 | 3719 days | 1% |
| Pierre and Alexandra | 6/10 | 3725 days | 1% |
| Julia Waenninger | 8/10 | 3737 days | 2% |
| Sarah Boettcher | 9/10 | 3773 days | 2% |
| Suzanne Vermeulen | 6/10 | 3790 days | 1% |
| Blandine Giusti | 7/10 | 3993 days | 1% |
| Bart Hanssen | 6/10 | 4072 days | 1% |
| Astrid Egesten | 7/10 | 4123 days | 1% |
| Jean Curry | 9/10 | 4347 days | 0% |
| Carla Oyarzun | 1/10 | 4351 days | 0% |
| Philippe Chiasson | 9/10 | 4357 days | 0% |
| Helma Druyken | 4/10 | 4367 days | 0% |
| Florian Guttler | 7/10 | 4370 days | 0% |
| Casandra Prunica | 8/10 | 4371 days | 0% |
| Lauren Hedley | 7/10 | 4371 days | 0% |
| Janina Zwerver | 8/10 | 4371 days | 0% |
| Marieke Feyteres | 4/10 | 4375 days | 0% |
| van Linda Werner | 5/10 | 4375 days | 0% |
| Philip Donachie | 7/10 | 4385 days | 1% |
| Luisa Bach | 8/10 | 4385 days | 1% |
| Kristina | 7/10 | 4387 days | 1% |
| Eugen Lehner | 6/10 | 4388 days | 1% |
| Manuel Bach | 7/10 | 4388 days | 1% |
| Matthias Freiling | 2/10 | 4395 days | 1% |
| Debora Grusler | 6/10 | 4398 days | 1% |
| Andreas Brodhaeker | 8/10 | 4411 days | 1% |
| Renee van der Syde | 7/10 | 4412 days | 1% |
| Martha Horst | 8/10 | 4412 days | 1% |
| Roland Beer | 7/10 | 4416 days | 1% |
| Johanna Bak | 4/10 | 4416 days | 1% |
| Lior Bakski | 9/10 | 4426 days | 1% |
| Bet | 9/10 | 4427 days | 1% |
| Memain | 8/10 | 4700 days | 1% |
| Konza | 7/10 | 4701 days | 1% |
| Steen Rausmussen | 8/10 | 4732 days | 1% |
| David Restell | 10/10 | 4762 days | 1% |
| Christina Rodewald | 9/10 | 4767 days | 1% |
| Hanneke P | 7/10 | 4793 days | 1% |
| Kohler | 9/10 | 4813 days | 1% |
| Alexandra van den Brack | 6/10 | 4821 days | 1% |
| Paul Lawrence | 9/10 | 4822 days | 1% |
| Abby Rushmer | 7/10 | 4823 days | 1% |
| Stephan Olivier | 7/10 | 4828 days | 1% |
| Stephan Olivier | 7/10 | 4828 days | 1% |
| Faassen | 8/10 | 4832 days | 1% |
| Julie Lamart | 8/10 | 4833 days | 1% |
| Adrian Weidell | 5/10 | 5029 days | 1% |
| Jonathan Tuthill | 9/10 | 5084 days | 1% |
| A Ormsby | 10/10 | 5096 days | 1% |
| Gillian Rowe | 10/10 | 5109 days | 1% |
| Ryan Pynappels | 8/10 | 5110 days | 1% |
| Peter Dellen | 8/10 | 5111 days | 1% |
| Jorg Steffens | 8/10 | 5111 days | 1% |
| Danielle & Jobbe | 9/10 | 5113 days | 1% |
| Christina | 6/10 | 5114 days | 1% |
| Jop Veldhuis | 7/10 | 5114 days | 1% |
| Paul Weidenfeld | 8/10 | 5115 days | 1% |
| Sophie Dorrepaal | 7/10 | 5115 days | 1% |
| Fannette Peyreplane | 5/10 | 5116 days | 1% |
| Norm Cooper | 7/10 | 5120 days | 1% |
| Gloria, Rose & An | 8/10 | 5120 days | 1% |
| A Sorg | 10/10 | 5120 days | 1% |
| Samplonius | 5/10 | 5123 days | 1% |
| Petra | 10/10 | 5123 days | 1% |
| Bethany Hamilton | 8/10 | 5127 days | 1% |
| suffolkhouse69 | 9/10 | 5128 days | 1% |
| a a | 8/10 | 5159 days | 1% |
| Julia Balionis | 7/10 | 5173 days | 1% |
| Julia Hartman | 3/10 | 5174 days | 1% |
| Fabienne Indergand | 7/10 | 5194 days | 1% |
| Waldemar Schuler | 9/10 | 5206 days | 1% |
| pepette31 | 7/10 | 5281 days | 1% |
| Craig Hathaway | 9/10 | 5433 days | 1% |
| Stephane Lebel | 9/10 | 5438 days | 1% |
| Rens Hemselmans | 7/10 | 5451 days | 1% |
| Isabell | 10/10 | 5453 days | 1% |
| Holly Cave | 5/10 | 5453 days | 1% |
| J Palmer | 6/10 | 5457 days | 1% |
| Liz & Jim | 10/10 | 5459 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5461 days | 1% |
| Simon Vickers | 2/10 | 5464 days | 1% |
| Leslie | 8/10 | 5477 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5478 days | 1% |
| Selina Mueller | 7/10 | 5479 days | 1% |
| Tamlin Barton | 3/10 | 5480 days | 1% |
| Cara Dungay | 8/10 | 5481 days | 1% |
| Bottcher | 10/10 | 5481 days | 1% |
| Alexandra | 10/10 | 5482 days | 1% |
| Philipp Rau | 7/10 | 5484 days | 1% |
| Dan Aldridge | 9/10 | 5486 days | 1% |
| John Allen | 8/10 | 5488 days | 1% |
| Curtis Penner | 8/10 | 5488 days | 1% |
| Brandt | 8/10 | 5490 days | 1% |
| Nadia Husain | 5/10 | 5493 days | 1% |
| T J Andrews | 6/10 | 5509 days | 1% |
| Charli Skinner | 7/10 | 5760 days | 1% |
| Carl_Larsen | 10/10 | 5769 days | 1% |
| Susan & Richard | 10/10 | 5830 days | 1% |
| Rik | 9/10 | 5831 days | 1% |
| Jonathan Martin | 7/10 | 5833 days | 1% |
| Gunda G | 9/10 | 5838 days | 1% |
| Aaron | 8/10 | 5840 days | 1% |
| Will Jemma | 6/10 | 5843 days | 1% |
| Christen Hans | 10/10 | 5844 days | 1% |
| Monica and Danie. | 7/10 | 5852 days | 1% |
| Stephen | 5/10 | 5854 days | 1% |
| Susan | 10/10 | 5854 days | 1% |
| snodge | 8/10 | 5858 days | 1% |
| Bo Moenstead | 9/10 | 5867 days | 1% |
| Alain Deslandres | 8/10 | 5871 days | 1% |
| Jakob Jurgen | 10/10 | 5872 days | 1% |
| EA Anders | 8/10 | 5875 days | 1% |
| Helen and Hans Walser | 1/10 | 5878 days | 1% |
| kevinp | 8/10 | 5901 days | 1% |
| warrenp | 9/10 | 5905 days | 1% |
| braunweiler | 9/10 | 5909 days | 1% |
| pimn | 9/10 | 5914 days | 1% |
| asiacritics | 7/10 | 5920 days | 1% |
| Chris Mackamul | 8/10 | 5927 days | 1% |
| Debbie Rathbone | 10/10 | 5927 days | 1% |
| Lisette X | 9/10 | 5928 days | 1% |
| Martin | 10/10 | 5930 days | 1% |
| Thomas Willi | 10/10 | 5930 days | 1% |
| Elodie | 7/10 | 5931 days | 1% |
| richardh | 7/10 | 6045 days | 1% |
| trvlbug | 8/10 | 6073 days | 1% |
| glennandjen | 10/10 | 6134 days | 1% |
| BryonyS | 9/10 | 6152 days | 1% |
| Marion | 9/10 | 6168 days | 1% |
| Mikey | 7/10 | 6169 days | 1% |
| Richard Komzik | 6/10 | 6170 days | 1% |
| Michael Walsall | 10/10 | 6174 days | 1% |
| Anna | 8/10 | 6188 days | 1% |
| Abigail | 7/10 | 6188 days | 1% |
| lannie | 7/10 | 6197 days | 1% |
| SimonR | 8/10 | 6198 days | 1% |
| SonjaG | 7/10 | 6198 days | 1% |
| Chris | 8/10 | 6204 days | 1% |
| AurelieD | 8/10 | 6211 days | 1% |
| Yunker | 10/10 | 6212 days | 1% |
| Andrew | 8/10 | 6214 days | 1% |
| Erin | 9/10 | 6214 days | 1% |
| Christopher Gallaga | 8/10 | 6220 days | 1% |
| Amy | 10/10 | 6226 days | 1% |
| Shona | 8/10 | 6226 days | 1% |
| plumbaum | 9/10 | 6228 days | 1% |
| Sandra | 10/10 | 6236 days | 1% |
| Evangelista | 8/10 | 6236 days | 1% |
| Oliver | 5/10 | 6238 days | 1% |
| Kat | 9/10 | 6268 days | 1% |
| Lisa | 8/10 | 6295 days | 1% |
| siobhan | 8/10 | 6297 days | 1% |
| Alice | 8/10 | 6297 days | 1% |
| NORTZ | 7/10 | 6326 days | 1% |
| Stefan | 8/10 | 6328 days | 1% |
| Hugh Trenchard | 9/10 | 6344 days | 1% |
| Niamh | 4/10 | 6350 days | 1% |
| Jenny | 9/10 | 6374 days | 1% |
| Louise | 8/10 | 6383 days | 1% |
| Peddy | 10/10 | 6393 days | 1% |
| Katie Wise | 8/10 | 6396 days | 1% |
| Thomas Bachmann | 8/10 | 6412 days | 1% |
| Daniala | 8/10 | 6431 days | 1% |
| Tom Ben | 9/10 | 6535 days | 1% |
| Sarah Maudsley | 8/10 | 6550 days | 1% |
| Alan Bellerby | 8/10 | 6550 days | 1% |
| Tina Daly | 5/10 | 6556 days | 1% |
| John Woodrow | 8/10 | 6565 days | 1% |
| Ernst Seter | 9/10 | 6565 days | 1% |
| Jim Curley | 7/10 | 6576 days | 1% |
| Daniel | 7/10 | 6577 days | 1% |
| Marc Hertogs | 7/10 | 6580 days | 1% |
| Laura Sutton | 5/10 | 6604 days | 1% |
| Jeroen | 5/10 | 6606 days | 1% |
| Mum! | 6/10 | 6606 days | 1% |
| Gail | 9/10 | 6610 days | 1% |
| Heike Julia | 6/10 | 6611 days | 1% |
| Lanni | 8/10 | 6611 days | 1% |
| Amanda Finger | 7/10 | 6612 days | 1% |
| Desiree Muri | 7/10 | 6612 days | 1% |
| Jan Grzejik | 8/10 | 6639 days | 1% |
| Wouter Ewalts | 8/10 | 6646 days | 1% |
| Matilde | 6/10 | 6654 days | 1% |
| Kim | 6/10 | 6851 days | 1% |
| Gillian | 8/10 | 6893 days | 1% |
| Denise Nick | 6/10 | 6903 days | 1% |
| ranker_110 | 8/10 | 6922 days | 1% |
| Jasper | 7/10 | 6929 days | 1% |
| Mary | 8/10 | 6929 days | 1% |
| Lucy | 6/10 | 6929 days | 1% |
| Lukas | 8/10 | 6940 days | 1% |
| Hanna | 7/10 | 6942 days | 1% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.15% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 52 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.09% |
| 198 | -4.11% |
| 199 | -4.13% |
| 200 | -4.15% |
| 201 | -4.17% |
| 202 | -4.19% |
| 203 | -4.22% |
| … | … |
Balancing Adjustment
6.11% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
78%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.